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Analog Devices Inc./Maxim Integrated MAX8559ETAJJ+
- Part No.:
- MAX8559ETAJJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX8559ETAJJ+.pdf
- Description:
- IC REG LINEAR 2.85V/2.85V 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,234
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Product details
Overview
MAX8559ETAJJ+ from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering two independent 2.85V outputs at up to 300mA each, operating from 2.5V–6.5V input. It features 32µVRMS output noise, 70dB PSRR at 10kHz, and 60mV dropout at 100mA load-designed for space-constrained, battery-powered systems requiring clean, stable dual-rail power.
For engineers reviewing the MAX8559ETAJJ+ datasheet, MAX8559ETAJJ+ pinout, MAX8559ETAJJ+ application, or MAX8559ETAJJ+ equivalent, key selection criteria include dual independent shutdown control, ultra-low quiescent current (115µA per LDO), factory-preset 2.85V/2.85V outputs, TDFN-EP package thermal performance, and bypass-capacitor-free operation capability.
Technical Context
The MAX8559ETAJJ+ integrates two independent P-channel MOSFET pass transistors (RDS(ON) ≈ 0.6Ω) with internal 1.25V bandgap reference and error amplifiers. Each LDO uses an internal resistor divider to set its 2.85V output, eliminating external feedback components.
It implements independent logic-controlled shutdown (SHDNA/SHDNB), thermal shutdown at +160°C with 10°C hysteresis, and output discharge via 385Ω internal resistors during shutdown-enabling precise power sequencing and rail isolation in portable electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.85V / 2.85V (factory-preset, no external resistors required) |
| Max Output Current | 300mA per channel-supports dual-core processors or RF + baseband rails |
| Dropout Voltage | 60mV at 100mA-enables >98% efficiency at light loads and extends battery runtime |
| Output Noise | 32µVRMS (100Hz–100kHz)-meets stringent analog/RF supply requirements without added filtering |
| PSRR | 70dB at 10kHz-rejects switching noise from adjacent DC/DC converters |
| Quiescent Current | 115µA per LDO (no load)-minimizes standby power in always-on subsystems |
| Input Voltage Range | 2.5V to 6.5V-compatible with single Li-ion, Li-poly, or regulated 3.3V/5V supplies |
Pinout & Package
MAX8559ETAJJ+ is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.8mm height) with exposed paddle for thermal dissipation. The package supports 1.95W power dissipation and requires soldering the exposed pad to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 INA | LDO A Input | Shared input rail for both regulators; must be bypassed with ≥2.2µF ceramic capacitor |
| 2 SHDNA | LDO A Shutdown Control | Logic-low disables OUTA; high-Z or tied to INA for always-on operation |
| 3 SHDNB | LDO B Shutdown Control | Logic-low disables OUTB; independent of SHDNA for flexible power sequencing |
| 4 INB | LDO B Input | Internally connected to INA; redundant pin for layout flexibility |
| 5 OUTB | LDO B Output | 2.85V regulated output; internally discharged to GND via 385Ω in shutdown |
| 6 GND | Ground Reference | Common return path for inputs, outputs, and internal circuitry |
| 7 BP | Noise Bypass Terminal | Accepts 0.01µF ceramic capacitor to reduce output noise by filtering reference path |
| 8 OUTA | LDO A Output | 2.85V regulated output; identical specs and discharge behavior as OUTB |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent shutdown | Enables selective powering of subsystems (e.g., keep RF active while disabling baseband) |
| No-bypass-capacitor operation | Reduces BOM count and board area-valid for applications where noise <254µVRMS is acceptable |
| Internal 385Ω output discharge | Prevents floating outputs and ensures fast, controlled rail collapse during shutdown |
| P-channel MOSFET pass devices | Eliminates base-drive current loss-delivers lower dropout than PNP-based LDOs at all load levels |
| Thermal shutdown with hysteresis | +160°C trip point with 10°C recovery margin prevents oscillation under sustained overload |
Applications
| Cellular Handsets | Wireless LAN Modules |
|---|---|
Use Scenario: Dual-rail power for baseband processor (2.85V) and RF transceiver (2.85V) in compact smartphone designs. IC Role / Device Role / Timing Role: Provides isolated, low-noise, independently controllable voltage rails with fast transient response. Use Value: Enables simultaneous operation or staggered startup/shutdown-reducing peak current draw and EMI during mode transitions. | Use Scenario: Powering 2.85V WLAN SoC and companion 2.85V RF front-end in mini-PCIe or M.2 wireless cards. IC Role / Device Role / Timing Role: Delivers tightly regulated, low-ripple supply to sensitive RF circuitry while supporting dynamic sleep/wake cycles. Use Value: 32µVRMS noise and 70dB PSRR prevent degradation of receiver sensitivity and transmit spectral purity. |
| Digital Cameras | Handheld Test Instruments |
Use Scenario: Supplying image sensor (2.85V) and ISP (2.85V) in battery-operated DSLR or mirrorless camera bodies. IC Role / Device Role / Timing Role: Dual LDO replaces discrete regulators-minimizing solution size while maintaining rail stability during burst capture. Use Value: 60mV dropout extends usable battery life by enabling operation down to ~2.91V input per rail. | Use Scenario: Powering precision ADC/DAC (2.85V) and microcontroller (2.85V) in portable multimeters or signal generators. IC Role / Device Role / Timing Role: Provides ultra-low-noise, thermally stable dual supplies critical for sub-LSB measurement accuracy. Use Value: Factory-preset 2.85V eliminates resistor tolerance errors-ensuring consistent full-scale calibration across production units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A20285PDBVR | Single 2.85V LDO (300mA), not dual; 16µVRMS noise, 65dB PSRR at 10kHz | Requires two devices for dual-rail use-increases board area and BOM cost | Select when only one rail is needed or when lower noise is prioritized over integration |
| ADP151AUJZ-2.85-R7 | Single 2.85V LDO (200mA), not dual; 9µVRMS noise, 70dB PSRR at 10kHz | Limited to 200mA per rail-insufficient for 300mA digital loads | Select for ultra-low-noise single-rail applications where current demand ≤200mA |
Compared with TPS7A20285PDBVR and ADP151AUJZ-2.85-R7, the MAX8559ETAJJ+ uniquely delivers dual 300mA 2.85V outputs in one 3mm×3mm TDFN package with independent shutdown-reducing component count, PCB area, and system-level power sequencing complexity.
Availability
MAX8559ETAJJ+ is available at Aetrix Electronics and suitable for cellular handsets, wireless LAN modules, digital cameras, handheld test instruments, and notebook computing applications requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX8559ETAJJ+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.
The MAX8559 belongs to Maxim's low-noise, low-IQ LDO family-engineered specifically for battery-powered portable electronics demanding dual-rail regulation, minimal footprint, and robust protection features.
FAQ
What output voltages does the MAX8559ETAJJ+ provide?
The MAX8559ETAJJ+ provides two fixed 2.85V outputs-VOUTA = 2.85V and VOUTB = 2.85V-as indicated by the "JJ" suffix in the part number per Maxim's Output Voltage Selector Guide. These values are factory-trimmed and require no external resistors, ensuring ±3% accuracy across -40°C to +85°C.
Does the MAX8559ETAJJ+ require an external bypass capacitor on the BP pin?
Yes-the MAX8559ETAJJ+ achieves its specified 32µVRMS output noise only when a 0.01µF low-leakage ceramic capacitor is placed between BP and GND. Omitting this capacitor increases output noise to 254µVRMS, though the device remains functional for less noise-sensitive applications.
Can the MAX8559ETAJJ+ operate without output capacitors?
No-the MAX8559ETAJJ+ requires minimum 2.2µF ceramic output capacitance per rail for stability. For 300mA loads, Maxim specifies ≥4.7µF. Operating without output capacitors risks oscillation, poor transient response, and potential damage due to instability.
What is the thermal performance difference between the UCSP and TDFN packages of the MAX8559ETAJJ+?
The MAX8559ETAJJ+ is only offered in the TDFN-EP package (not UCSP). Its exposed paddle enables 1951mW max power dissipation at +70°C ambient, with 24.4mW/°C derating above that temperature-significantly higher than the UCSP variant's 379mW limit-making it suitable for higher-power dual-rail applications.
How does the MAX8559ETAJJ+ handle short-circuit conditions?
The MAX8559ETAJJ+ incorporates independent current limiting per output, tripping at ≥310mA (min). During a sustained short, it enters constant-current foldback mode while maintaining thermal shutdown protection-allowing indefinite safe operation without damage, unlike unguarded LDOs.
MAX8559ETAJJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 2.85V, 2.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.12V @ 100mA, 0.12V @ 100mA
- Current - Output:
- 300mA, 300mA
- Current - Quiescent (Iq):
- 290 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 54dB (10kHz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (3x3)
MAX8559ETAJJ+ FAQ
1.How can I place an order for MAX8559ETAJJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559ETAJJ+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX8559ETAJJ+ reliable?
The price and inventory of MAX8559ETAJJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559ETAJJ+ is usually 5 days.
3.What payment methods are accepted for MAX8559ETAJJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559ETAJJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559ETAJJ+?
MAX8559ETAJJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559ETAJJ+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX8559ETAJJ+?
For technical support, including MAX8559ETAJJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559ETAJJ+ requirements.
6.How does Aetrix verify that MAX8559ETAJJ+ is sourced from the original manufacturer or authorized distributors?
All MAX8559ETAJJ+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX8559ETAJJ+ meets industry standards.
7.What is the process for return or replacement of MAX8559ETAJJ+?
All MAX8559ETAJJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559ETAJJ+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX8559ETAJJ+ part is unused and in its original packaging.
Return procedure for MAX8559ETAJJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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